海路

1. Origins, structure, and basic meaning

• Structure: 海路 (かいろ) is a noun for a sea route or travel by sea.
• Basic usage: It describes transporting materials by sea or checking a route to a continent on a map.
  • 島へは海路で資材を運んだ。 — Materials were transported to the island by sea.
  • 古い地図で大陸までの海路を確かめた。 — We checked the sea route to the continent on an old map.

2. Common pitfalls and similar expressions

• Means and route
  • 海路で presents travel by sea as the means, while 大陸までの海路 identifies the route leading to a destination.